Month: December 2022

Physical and sensory properties of lemon-flavored acidic beverages formulated with nonfat dry milk during storage was written by Li, Nan;Choi, Inseob;Vuia-Riser, Jennifer;Carter, Brandon;Drake, MaryAnne;Zhong, Qixin. And the article was included in Journal of Dairy Science in 2022.Application In Synthesis of Octyl acetate The following contents are mentioned in the article:

Sensory and phys. properties of 2 lemon-flavored beverages with 5% and 7.5% wt/wt nonfat dry milk (NFDM) at pH 2.5 were studied during storage. The 2 beverages had similar volatile compounds, but the 5% NFDM had higher aroma and lemon flavor, with a preferred appearance by consumers due to the lower turbidity and viscosity. After 28 d of storage at 4°C, lemon flavor decreased in the 5% NFDM beverage but was still more intense than the 7.5% one. During 70 d of storage, no microorganisms were detected, and the beverages were more stable when stored at 4°C than at room temperature according to changes of phys. properties measured for appearance, turbidity, color, particle size, zeta potential, rheol. properties, and transmission electron microscopy morphol. Findings of the present study suggest that NFDM may be used at 5% wt/wt to produce stable acidic dairy beverages with low turbidity when stored at 4°C. This study involved multiple reactions and reactants, such as Octyl acetate (cas: 112-14-1Application In Synthesis of Octyl acetate).

Octyl acetate (cas: 112-14-1) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Application In Synthesis of Octyl acetate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Catalytic and Atom-Economic Glycosylation using Glycosyl Formates and Cheap Metal Salts was written by Yang, Liang;Hammelev, Christian H.;Pedersen, Christian M.. And the article was included in ChemSusChem in 2020.Name: (2S,3R,4S,5R,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate The following contents are mentioned in the article:

Benzylated glycosyl formates have been synthesized in one step from the corresponding hemiacetal or orthoester with formic acid as the sole reagent. The glycosyl formates are used as glycosyl donors under catalytic conditions with cheap metal catalysts based on iron or bismuth. A ¹³C NMR spectroscopic method is developed and evaluated for screening reactions conditions, giving precise information on the selectivity, yield, and byproducts formed. The major side reaction is transesterification, which gives the formylated acceptor and regenerates the hemiacetal. By using this approach, catalyst loadings and solvents are optimized and the scope of the glycosylation is evaluated for a variety of glycosyl donors and acceptors. A proof of concept for a traceless glycosylation, utilizing a dual-purpose iron catalyst that catalyzes both glycosylation and dehydrogenation of formic acid, is also provided. This study involved multiple reactions and reactants, such as (2S,3R,4S,5R,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate (cas: 604-69-3Name: (2S,3R,4S,5R,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate).

(2S,3R,4S,5R,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate (cas: 604-69-3) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits, including apples, durians, pears, bananas, pineapples, and strawberries. Acyl chlorides and acid anhydrides alcoholysis is another way to produce esters. Acyl chlorides and acid anhydrides react with alcohols to produce esters. Anydrous conditions are recommended since both acyl chlorides and acid anhydrides react with water.Name: (2S,3R,4S,5R,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Hepatoprotective effects of Moringa oleifera Lam (Moringaceae) leaf extracts in streptozotocin-induced diabetes in rats was written by Muzumbukilwa, Willy Tambwe;Nlooto, Manimbulu;Owira, Peter Mark Oroma. And the article was included in Journal of Functional Foods in 2019.Synthetic Route of C10H20O2 The following contents are mentioned in the article:

Effects of methanolic leaf extracts of Moringa oleifera (MO) on hepatic injury in streptozotocin (STZ)-induced diabetes were investigated. Male Wister rats were divided into 6 groups (n = 7). Animals in group A were orally treated daily with 3.0 mL/kg/body weight (BW) of distilled water, while B, E and F were similarly treated with 500, 250 and 500 mg/kg/BW of MO, resp. Groups C-F were rendered diabetic by single i.p. injections of 45 mg/kg/BW of STZ. Addnl., group D was treated with s.c. insulin (2.0 U/kg/BW, bid). Diabetic animals exhibited significant weight loss, polydipsia, impaired glucose tolerance, fasting hypoinsulinemia and impaired liver function tests compared to controls. Treatment with MO methanolic leaf extracts significantly improved weight loss, polydipsia, glucose tolerance and also liver function tests in diabetic animals. MO has dose-dependent antidiabetic and hepatoprotective effects. This study involved multiple reactions and reactants, such as Octyl acetate (cas: 112-14-1Synthetic Route of C10H20O2).

Octyl acetate (cas: 112-14-1) belongs to esters. Esters are also usually derived from carboxylic acids. It may also be obtained by reaction of acid anhydride or acid halides with alcohols or by the reaction of salts of carboxylic acids with alkyl halides. Esterification is the general name for a chemical reaction in which two reactants (typically an alcohol and an acid) form an ester as the reaction product. Esters are common in organic chemistry and biological materials.Synthetic Route of C10H20O2

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Ultraviolet spectrophotometry in drug control. XXVIII. New pharmaceuticals with chromophores of benzene rings in the molecules. 3. Effect of substitution and solvents was written by Kracmar, J.;Kracmarova, J.. And the article was included in Cesko-Slovenska Farmacie in 1982.Application of 5003-48-5 The following contents are mentioned in the article:

UV spectra of 10 drugs with a benzene chromophore, baclofen  [1134-47-0], lorcainide  [59729-31-6], DL-ibuprofen  [15687-27-1], DL-mexiletine  [31828-71-4], clonidine  [4205-90-7], ketoconazole  [65277-42-1], terbutaline  [23031-25-6], propafenone  [54063-53-5], xipamide  [14293-44-8], and benorilate  [5003-48-5] were described. Solvent effects on absorption shifts, absorption maximum of characteristic bands, and Beer’s law were discussed and specific absorbances calculated Use of these spectra for characterization and determination are discussed. Concentration ranges for determination in μg amounts are given. This study involved multiple reactions and reactants, such as 4-Acetamidophenyl 2-acetoxybenzoate (cas: 5003-48-5Application of 5003-48-5).

4-Acetamidophenyl 2-acetoxybenzoate (cas: 5003-48-5) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits, including apples, durians, pears, bananas, pineapples, and strawberries. Esterification is the general name for a chemical reaction in which two reactants (typically an alcohol and an acid) form an ester as the reaction product. Esters are common in organic chemistry and biological materials.Application of 5003-48-5

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

The effect of sugarcane bagasse to rubber seed oil ratios on the chemical composition of liquid fuels produced by zeolite-Y catalyzed pyrolysis was written by Simanjuntak, A.;Simanjuntak, W.;Pandiangan, K. D.;Sembiring, Z.. And the article was included in Journal of Physics: Conference Series in 2019.Synthetic Route of C8H16O2 The following contents are mentioned in the article:

In this research, co-pyrolysis of sugarcane bagasse and rubber seed oil using zeolite-Y as catalyst was carried out, with the main purpose to study the effect of raw material compositions on chem. composition of liquid fuel produced. For this purpose, the mixture of sugarcane bagasse and rubber seed oil with different mass ratios of bagasse to oil of 1 : 1; 1: 2; 1: 3: and 1: 4 was subjected to pyrolysis at 450° C in the presence of zeolite-Y as catalyst, and the liquid fuels were analyzed by GC-MS. The results show that liquid fuel contains hydrocarbons as main components, with several addnl. components include alcs., esters, ketones, aldehydes, and acids. The liquid fuel produced from the raw material with the ratio of 1 : 3 was found to contain hydrocarbon with the highest relative percentage (87.91%), and consists of gasoline fraction (42.60%), kerosene fraction (43.59%), and residual fraction (1.72%). This study involved multiple reactions and reactants, such as Methyl heptanoate (cas: 106-73-0Synthetic Route of C8H16O2).

Methyl heptanoate (cas: 106-73-0) belongs to esters. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Esterification is the general name for a chemical reaction in which two reactants (typically an alcohol and an acid) form an ester as the reaction product. Esters are common in organic chemistry and biological materials.Synthetic Route of C8H16O2

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

β-Galactosidase instructed supramolecular hydrogelation for selective identification and removal of senescent cells was written by Xu, Tengyan;Cai, Yanbin;Zhong, Xinglong;Zhang, Le;Zheng, Debing;Gao, Zhengfeng;Pan, Xianmei;Wang, Fuqiang;Chen, Minsheng;Yang, Zhimou. And the article was included in Chemical Communications (Cambridge, United Kingdom) in 2019.Safety of (2S,3R,4S,5R,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate The following contents are mentioned in the article:

The identification and removal of senescent cells is very important to improve human health and prolong life. In this study, we introduced a novel strategy of β-galactosidase (β-Gal) instructed peptide self-assembly to selectively form nanofibers and hydrogels in senescent cells. We demonstrated that the in situ formed nanofibers could alleviate endothelial cell senescence by reducing p53, p21, and p16^INK4a expression levels. We also demonstrated that our strategy could selectively remove senescent endothelial cells by inducing cell apoptosis, with an increase in the BAX/BCL-2 ratio and caspase-3 expression. Our study reports the first example of enzyme-instructed self-assembly (EISA) by a sugar hydrolase, which may lead to the development of supramol. nanomaterials for the diagnosis and treatment of many diseases, such as cancer, and for other applications, such as wound healing and senescence. This study involved multiple reactions and reactants, such as (2S,3R,4S,5R,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate (cas: 604-69-3Safety of (2S,3R,4S,5R,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate).

(2S,3R,4S,5R,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate (cas: 604-69-3) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits. Esters are more polar than ethers but less polar than alcohols. They participate in hydrogen bonds as hydrogen-bond acceptors, but cannot act as hydrogen-bond donors, unlike their parent alcohols. This ability to participate in hydrogen bonding confers some water-solubility.Safety of (2S,3R,4S,5R,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Oxidative esterification of aliphatic aldehydes and alcohols with ethanol over gold nanoparticle catalysts in batch and continuous flow reactors was written by Taketoshi, Ayako;Ishida, Tamao;Murayama, Toru;Honma, Tetsuo;Haruta, Masatake. And the article was included in Applied Catalysis, A: General in 2019.SDS of cas: 112-14-1 The following contents are mentioned in the article:

Selective esterification of aliphatic aldehydes and alcs. with ethanol in the absence of a base is a more difficult reaction than that with methanol. Gold nanoparticles on ZnO were found to catalyze the oxidative esterification of octanal to Et octanoate with high selectivity. In addition, it was found that Au/ZnO was the most effective catalyst for yielding the desired Et ester without a base by direct esterification of 1-octanol with ethanol. As far as we know, this is the first report on oxidative esterification to give aliphatic Et esters from less reactive aliphatic alcs. and aldehydes without a base. The optimal size of gold NPs ranged from 2 to 6 nm and the presence of Au(0) was indispensable for this reaction. Au/ZnO exhibited the highest catalytic activity in both batch and flow reactors. The conversion was maintained for more than 20 h with 95% selectivity to the desired Et ester in the flow system. This study involved multiple reactions and reactants, such as Octyl acetate (cas: 112-14-1SDS of cas: 112-14-1).

Octyl acetate (cas: 112-14-1) belongs to esters. Volatile esters with characteristic odours are used in synthetic flavours, perfumes, and cosmetics. Certain volatile esters are used as solvents for lacquers, paints, and varnishes. Esters are more polar than ethers but less polar than alcohols. They participate in hydrogen bonds as hydrogen-bond acceptors, but cannot act as hydrogen-bond donors, unlike their parent alcohols. This ability to participate in hydrogen bonding confers some water-solubility.SDS of cas: 112-14-1

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Boron-Catalyzed Double Hydrofunctionalization Reactions of Unactivated Alkynes was written by Shibuya, Masatoshi;Okamoto, Masaki;Fujita, Shoji;Abe, Masanori;Yamamoto, Yoshihiko. And the article was included in ACS Catalysis in 2018.Application of 106-73-0 The following contents are mentioned in the article:

In the presence of (C₆F₅)₃B·nH₂O, alkynyl alcs. such as HOCH₂CPh₂CH₂CCH underwent tandem hydroalkoxylation and hydroallylation or hydrocyanation reactions with allyltrimethylsilane or cyanotrimethylsilane with H₂O as a proton source to yield cyano- and allyl-substituted tetrahydrofurans such as I (R = H₂C:CHCH₂, NC). The high alkynophilicity of B(C₆F₅)₃ enabled the selective activation of unactivated alkynes in the presence of the alkene moiety of allylsilane and in the presence of cyanide. ¹⁹F NMR of intermediate reaction mixtures indicated that alkynes were activated by free (C₆F₅)₃B in allylation reactions and by H⁺[(C₆F₅)₃BCN^–] in cyanation reactions. This study involved multiple reactions and reactants, such as Methyl heptanoate (cas: 106-73-0Application of 106-73-0).

Methyl heptanoate (cas: 106-73-0) belongs to esters. Esters are also usually derived from carboxylic acids. It may also be obtained by reaction of acid anhydride or acid halides with alcohols or by the reaction of salts of carboxylic acids with alkyl halides. Esters are more polar than ethers but less polar than alcohols. They participate in hydrogen bonds as hydrogen-bond acceptors, but cannot act as hydrogen-bond donors, unlike their parent alcohols. This ability to participate in hydrogen bonding confers some water-solubility.Application of 106-73-0

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Well-defined Cp*Co(III)-catalyzed Hydrogenation of Carbonates and Polycarbonates was written by Dahiya, Pardeep;Gangwar, Manoj Kumar;Sundararaju, Basker. And the article was included in ChemCatChem in 2021.Computed Properties of C13H10O3 The following contents are mentioned in the article:

The authors herein report the catalytic hydrogenation of carbonates and polycarbonates into their corresponding diols/alcs. using well-defined, air-stable, high-valent cobalt complexes. Several novel Cp*Co(III) complexes bearing N,O-chelation were isolated for the first time and structurally characterized by various spectroscopic techniques including single crystal X-ray crystallog. These novel Co(III) complexes have shown excellent catalytic activity to produce value added diols/alcs. from carbonate and polycarbonates through hydrogenation using mol. hydrogen as sole reductant or i-PrOH as transfer hydrogenation source. To demonstrate the developed methodol.’s practical applicability, the authors have recycled the bisphenol A monomer from compact disk (CD) through hydrogenation under the established reaction conditions using phosphine-free, earth-abundant, air- and moisture-stable high-valent cobalt catalysts. This study involved multiple reactions and reactants, such as Diphenyl carbonate (cas: 102-09-0Computed Properties of C13H10O3).

Diphenyl carbonate (cas: 102-09-0) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits. Because of their lack of hydrogen-bond-donating ability, esters do not self-associate. Consequently, esters are more volatile than carboxylic acids of similar molecular weight.Computed Properties of C13H10O3

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Assignment of configurations of conjugated dienic pheromones by fuzzy classification of carbon-13 chemical shifts was written by Zhang, Youjie;Huang, Wenfang;Zhu, Jun. And the article was included in Analytica Chimica Acta in 1990.Safety of (E)-Dodeca-9,11-dien-1-yl acetate The following contents are mentioned in the article:

The configurations of conjugated dienes, and some sex pheromones and analogous compounds, can be characterized by a fuzzy classification method applied to the ¹³C chem. shifts of the dienic carbons. A fuzzy relation matrix of 12 model dienes is set up, and a fuzzy parameter (λ) is established. If λ â‰?.95 in the similarity test of two dienes, then both dienes have the same configuration. Some empirical rules dealing with the influence of terminal groups and assignment of the order of dienic carbons are presented. Configurations of 14 compounds prepared by different methods were established reliably. After correct assignments of dienic carbons, the method was used to quantify the isomeric composition of (10,12)-pentadecadienyl acetate, (9,11)-tridecadienyl acetate and (9,11)-tetradecadienyl acetate by the inverted gated decoupling technique; the results agreed well with those obtained by gas chromatog. This study involved multiple reactions and reactants, such as (E)-Dodeca-9,11-dien-1-yl acetate (cas: 50767-78-7Safety of (E)-Dodeca-9,11-dien-1-yl acetate).

(E)-Dodeca-9,11-dien-1-yl acetate (cas: 50767-78-7) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Polyesters are important plastics, with monomers linked by ester moieties. Acyl chlorides and acid anhydrides alcoholysis is another way to produce esters. Acyl chlorides and acid anhydrides react with alcohols to produce esters. Anydrous conditions are recommended since both acyl chlorides and acid anhydrides react with water.Safety of (E)-Dodeca-9,11-dien-1-yl acetate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics